About this compost

Finished screened compost, fully broken down and ready to work into beds. The general purpose choice for building soil that holds water and feeds roots.

We had a great experience with mulch mound! Our mulch arrived when we requested. The delivery fee was so reasonable. We’ll use them again for sure!

One cubic yard of compost covers about 324 square feet at a 1 inch depth, which is what you want for lawn top dressing. For bed amending you're going 2 to 3 inches deep and tilling it in, so that same yard covers closer to 110 to 160 square feet depending on how deep you go. Measure your bed or lawn area first, then decide top dressing versus tilling before you order.

A yard is approximately 27 cubic feet. As a general guideline, one yard of material can cover an area of about 100-160 square feet at a 2-3 inch depth.

Boulder Compost Delivery

Boulder Compost Delivery

4.7
137 reviews
Regular price $60.00 per Yard
Regular price Sale price $60.00
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The best local compost, without the guesswork.

We hand-pick and partner with the best yards in your region, keep only the ones our buyers rate well, and back each load with our guarantee.

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About this compost

Finished screened compost, fully broken down and ready to work into beds. The general purpose choice for building soil that holds water and feeds roots.

We had a great experience with mulch mound! Our mulch arrived when we requested. The delivery fee was so reasonable. We’ll use them again for sure!

One cubic yard of compost covers about 324 square feet at a 1 inch depth, which is what you want for lawn top dressing. For bed amending you're going 2 to 3 inches deep and tilling it in, so that same yard covers closer to 110 to 160 square feet depending on how deep you go. Measure your bed or lawn area first, then decide top dressing versus tilling before you order.

A yard is approximately 27 cubic feet. As a general guideline, one yard of material can cover an area of about 100-160 square feet at a 2-3 inch depth.

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How It Works

Getting started is easy — just follow these simple steps

1

Choose your quantity

Adjust the quantity to match your project. One cubic yard covers about 100 to 160 square feet at a 2 to 3 inch depth.

2

Select your delivery date

Select a delivery date you'd like for the product to be dropped off at your home

3

Sit back and wait

Sit back, wait, and let us work our magic to make sure the highest quality product is delivered to your driveway.

From The Mouths of Boulder Folks

4.7
out of 5 based on 137 reviews
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Complete Your Outdoor Project

Compost pairs well with a topsoil blend if you're building a new bed from scratch in that clay loam, and a lot of Boulder customers order both mulch and compost together, compost worked in first, mulch on top once planting is done. If you're overseeding a lawn this fall, compost top dressing right before seed down gives the seed something better to root into than bare clay.

Map of the compost delivery area around Boulder, Colorado

Service area

Areas we deliver compost in Boulder, Colorado

Mulch Mound Pro Tip

Boulder's clay loam is dense enough that surface-applied compost can sit and shed water instead of soaking in, especially on a slope. Break the surface first with a rake or light till before spreading, even on lawns. A light aeration pass ahead of top dressing helps the compost actually reach root zone instead of crusting over, which matters more here than it does in sandier soils.

Mulch Mound Pro Tip

The common mistake is treating compost like mulch and layering it thick on top of beds expecting it to last all season. Finished compost breaks down and gets absorbed within a few months, it's not meant to sit as a visible layer. Apply your 2 to 3 inches, work it in, and plan to reapply at the next planting cycle rather than piling more on top mid season.

Mulch Mound Pro Tip

Compost sells well here in both spring and fall, and timing it to either edge of the growing season, right after last frost in May or ahead of the October frost, gets it working before you need active root growth. Ordering compost and mulch on the same delivery saves a second truck trip if your project needs both, since most Boulder beds end up wanting a top layer of mulch once the compost is worked in.

Building Better Soil in Boulder

Clay loam is the default soil across most of Boulder, and it compacts hard by late summer, especially with the freeze thaw cycles we get before that October 3 frost sets in. Compost breaks that structure open over a season or two, giving roots somewhere to actually spread. At 5,430 feet the growing window is already short, so a lot of gardeners here use compost in spring to get beds productive fast and again in fall to rebuild what the season used up. It is not a mulch and it is not meant to sit on top, it wants to get mixed in or worked down.

What Finished Compost Is

Finished compost is organic matter that has fully broken down into a dark, crumbly material with an earthy smell. It feeds soil life, improves structure, and helps beds hold water without staying soggy.

How Much to Apply

Work 1 to 2 inches into new beds, or topdress lawns with a quarter to half inch and rake it in. More is not better. Too thick a layer can smother roots instead of feeding them.

When to Apply

Spring and fall are both good windows. Spring applications feed the growing season ahead, and fall applications break down over winter so beds are ready at first thaw.

Frequently Asked Questions

Click a question to see the answer

Answer

Is compost the same as topsoil for a new bed in Boulder?

No, compost is a soil amendment, not a growing medium on its own. Boulder's clay loam usually needs compost mixed in rather than replaced, since the clay provides structure and minerals the compost lacks. For a brand new bed built from scratch, we recommend a topsoil and compost blend rather than compost alone.

Answer

How many cubic yards of compost do I need for a 500 square foot lawn?

At 1 inch top dressing depth, one cubic yard covers about 324 square feet, so a 500 square foot lawn needs roughly 1.5 cubic yards. Round up slightly rather than down, since spreading thin and running short mid-lawn is harder to fix than having a little extra.

Answer

When should I put compost down, spring or fall?

Both work in Boulder. Spring application, after the May 5 last frost, kickstarts beds and lawns heading into the growing season. Fall application, ahead of the October 3 frost, rebuilds soil structure over winter so beds are ready to plant early next year. Pick whichever matches your project timing rather than waiting for a specific season.

Answer

Where will the compost be dropped and do I need a special access point?

We place the load wherever the truck can safely reach, typically a driveway or curbside staging area you point out at delivery. Standard residential driveways and streets across Boulder work fine, but let us know ahead if you're on a narrow mountain access road or steep grade so we can plan the drop.

Answer

Should I get compost or mulch for my vegetable beds?

Compost, worked into the soil, is what feeds the plants and improves that clay loam structure. Mulch sits on top and manages moisture and weeds but doesn't add nutrients the way compost does. Most vegetable bed setups here use both, compost tilled in at 2 to 3 inches, then a mulch layer once things are planted.

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